What is CVE-2025-66403?

CVE-2025-66403 is a medium-severity vulnerability in Error311 Filerise, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2025-12-01.

How severe is CVE-2025-66403?

Medium severity. CVSS v3 base score is 4.6 out of 10.

XSS in Error311 Filerise

CVE-2025-66403

FileRise is a self-hosted web-based file manager with multi-file upload, editing, and batch operations. Prior to 2.2.3, a stored cross-site scripting (XSS) vulnerability exists in the Filerise application due to improper handling of upload…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (4.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.6 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N.

Affected products

Error311 Filerise — versions < 2.2.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/error311/FileRise/security/advisories/GHSA-qrcv-vjvf-fr29 (x_refsource_CONFIRM)
https://github.com/error311/FileRise/commit/f2ce43f18f0444f8f63f7c33758d1837dd5ba91e (x_refsource_MISC)

Frequently asked questions

What is CVE-2025-66403?: CVE-2025-66403 is a medium-severity vulnerability in Error311 Filerise, classified under Cross-site Scripting. CVSS score: 4.6/10. Published 2025-12-01.
How severe is CVE-2025-66403?: Medium severity. CVSS v3 base score is 4.6 out of 10.